A Medium-Scalestudy of Recovery of Nitrogen and Phosphorus by Struvite Crystallization from Swine Wastewater
[1]WANG Yan,PENG Kai,WANG Ke-ke,et al.A Medium-Scalestudy of Recovery of Nitrogen and Phosphorus by Struvite Crystallization from Swine Wastewater[J].Journal of Zhengzhou University (Engineering Science),2013,34(04):81-84.[doi:10.3969/j.issn.1671-6833.2013.04.019]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
34
Number of periods:
2013 04
Page number:
81-84
Column:
Public date:
2013-09-09
- Title:
- A Medium-Scalestudy of Recovery of Nitrogen and Phosphorus by Struvite Crystallization from Swine Wastewater
- Keywords:
- swine farm wastewater; magnesium ammonium phosphate; Na; PO; · 12H; O
- CLC:
- X713
- Abstract:
- In view of the problems of shortage of carbon source and excess of nitrogen content in traditional ni-trogen and phosphorus removal,this paper adopts the method of magnesium ammonium phosphate (MAP)crystallization to recover a part of N and P to increase the ratio of carbon to nitrogen,which is beneficial forfollowing biological treatment. The results show that the optimal reaction condition,the molar ratio of n(Mg):n(N):n(P)=1.2∶1:0.9, was obtained through single factor experiment when choosing MgCl2·6H,0 Na,PO·12H,0 as magnesium source and phosphorus source. In this condition , the content of N, P, 0, and MgOof the sediment，slow-release organic fertilizer,recovered is 4.1 % , 40.77% and 15.85% , respectively.Af-ter recovering,the pH of the wastewater is about 8.5，the ratio of n( BOD,): n(N):n(P) almost 95: 5:1,the concentration of residual nitrogen and phosphorus approximately 170 mg/L and 20 mg/L, it can be reducedby with by microorganism treatment.
- References:
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- Similar References:
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Last Update:
1900-01-01